Adjustable roller-track



F. c. MAIRSON. v ADJUSTABLE ROLLER TRACK.

APPLICATION FILED MAY 6. 1919.

Patented Nov. 9, 1920.

llIIIllIllIIlIllIIII--Illll INVINTQI. M C. M6070.

FRED CHARLES IVIAIRSON, OF CHICAGO, ILLINOIS.

ADJUSTABLE ROLLER-TRACK.

Specification of Letters Patent.

Patented Nov.9, 1920.

Application filed May 6, 1919. Serial No. 295,224.

To all whom it may concern Be it known that I, FRED CHARLES Man:- SON, acitizen of the United States, residing at Chicago, in the county of Cookand State of Illinois, having invented new and useful Improvements inAdjustable Roller-Tracks, of which the following is a full, clear,concise, and exact description, reference being had to the accompanyingdrawing, forming part of this specification.

My invention pertains to adjustable tracks, and especially relates toadjustable roller tracks for the ink rollers of printing presses,particularly platen presses of the Gordon type.

In the ordinary platen printing press, inking rollers are reciprocatedbetween an ink disk and the type at every cycle of the press, therebyconveying ink from the disk and spreading it over the type in the form.These inking rollers are provided with rolls which run upon tracksformed by the edges of the side arms which support the disk. It hasheretofore been proposed to provide ad1 justablc tracks to take theplace, in operation, of the stationary tracks above referred to, therebyto permit the ink rollers to be brought closer to the type, or be movedfarther away from it, in accordance with the nature of the job beingprinted, and to permit of compensation for wear of the tracks or of therolls of the inking rollers, and for shrinkage or expansion of therollers due to climatic changes or the like. It is the principal objectof my invention to improve upon such adjustable roller tracksparticularly with regard to the means for effecting the adjustment. Itis another object of my invention to provide such an adjustable rollertrack which will require a minimum amount of work upon the press inorder to permit of its attachment thereto.

As an example of one form in which my invention may be embodied, I- havedescribed in the following specification, and shown in the accompanyingdrawing, an adjustable .roller track constructed in accordance with myinvention, as applied to a printing press of the Gordon type.

In the drawing:

Figure 1 is a side elevation of a portion of a Gordon press, having anadjustable roller track constructed in accordance with my inventionapplied thereto;

Fig. 2 is an enlarged view of the top of the track; and g F ig. 3 is asection on the line 3-3 of Fig. 2, looking in the direction of thearrows.

In the drawing, 10 indicates one of the side frames of the press, and 11the ink disk. Traveling between the ink disk and the form carriedbetween the frames 10 are the inking rollers supported in the carriages12. These carriages have rollers 13 which, in a press not provided withauxiliary tracks, run upon the edges of the frames 10.

In carrying-out my invention, I provide track members mounted on theoutside faces of the frames 10. Each of these track members includes afront portion 14, the outer edge of which is shaped in conformity withthe shape of the tracking edge of the frame 10 and an inner portion 15of a reduced thickness. In practice, a track member is placed on eachside of the press, being mounted upon the outer faces of the frames 10.This mounting is so effected as to permit of an inward and outwardadjustment with respect to the plane of the type surface. To permit ofthis adjustment I provide a device at each end of each roller track.Each of these devices comprises an eccentric 16 mounted in the trackmember at the side thereof next the adjacent frame 10. The eccentric 16is formed with a head 17 of enlarged diameter, which rests upon ashoulder 18 formed in the track member. A cap screw 20 passes throughthe eccentric 16 and head 17 and is tapped into the frame 10. The head17 is provided with notches 21 for receiving a spanner wrench.

In effecting an adjustment of the tracks, the cap screw 20 of one of thetracks is first loosened, thereby permitting the eccentrics 16 to berotated by means of their heads 17. By applying a spanner wrench to theheads 17, the eccentrics 16 are then turned so as to give the requiredadjustment of the track member with respect to the plane of the face ofthe type. Upon again tightening the capscrews 20, the heads 17 firmlyclamp the track member against the frame, and prevent its movement fromthe adjusted position. It will be noted that the adjustment may be madevery easily and quickly, and with great fineness. Attention is furtherdrawn to the fact that the adjusting means is of an exceedingly simplecharacter and cannot possibly be put out. ofrorder invthe course ofordinary use. A further advantage lies in the fact that the applicationof my improved adjustable track to a press requires nothing more thanthe drilling and tapping of the four holes for the cap screws 20, andthat such nicety of positioning of these holes as would necessitatehighly skilled workmanship is not required.

Paving thus fully described my invention, what I claim as new and esireto secure by Letters Patent, is: v

1. In combination, a printing press frame, adjustable roller railsmounted each side of the frame, a pair of eccentric adjusting elementsfor each rail, one disposed each side of the center of each rail,andmeans for locking each eccentric and the roller rails to the frame.

i 2. In combination, a printing press frame, formed with alined threadedopenings, adjustable roller rails mounted each side the frame, each railhaving openings one each side the center, said openings being eccentricto the openings in the frame, eccentrics mounted in the eccentricopenings, and screws extending through the eccentrics and into thethreaded opening in the frame to lock the eccentric and the raiis to theprinting frame.

I 3. In combination, a printing press me, formed near the top and bottomwith alincd threaded openings, roller rails at each side the frame, eachroller rail having openings near the top and bottom, eccentric to andadjacent the threaded openings, flanged cccentrics mounted in theopenings in the rails, the flanges of the eccentrics enge the outersurfaces of the rails, and th attled 40 elements passing through theeccentrics and into the threaded openings to lock the cccentrics andrails in adjusted position.

, In witness whereof I have hereunto subscribed my name in the presenceof a witto ness.

Witness 1 THEO B. Fos'rnn.

